Sounds like address verification is safe to use. Here's the link: http://www.postfix.org/ADDRESS_VERIFICATION_README.html#how For this DMARC thing, the following seems to be the main site for it:
http://get.proofpoint.com/assets/wp-getting-started-with-dmarc?utm_source=google&utm_medium=cpc&utm_campaign=GS-US-EN-DMARC&gclid=EAIaIQobChMIo9rF5ZLX3gIVi7jACh0DoQDWEAAYAiAAEgIwUPD_BwE _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
